2026 ICD-10-CM Diagnosis Code Z96.21Cochlear implant status

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z96

ICD-10-CM Z96.21
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z96.21 is a billable ICD-10-CM diagnosis code for cochlear implant status. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor. Coders also document this condition as cochlear prosthesis in situ. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Implant, device or graft related encounter.

Code Identity

ICD-10-CM Code
Z96.21
Billable Status
Yes — Valid for Submission
Code Describes
Cochlear implant status
Short Description
Cochlear implant status
Same as the full description in the CMS dataset.
Parent Code
Z96.2
Presence of otological and audiological implants

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ96Presence of other functional implants
This CodeZ96.21Cochlear implant status

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z96.21.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cochlear prosthesis in situ

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Presence(of)
      • cochlear implant (functional)
    • Presence(of)
      • ear implant
        • cochlear implant
    • Presence(of)
      • hearing-aid or device (external)
        • implant (bone) (cochlear) (functional)
    • Presence(of)
      • implanted device (artificial) (functional) (prosthetic)
        • cochlear
    • Presence(of)
      • implanted device (artificial) (functional) (prosthetic)
        • otological
          • cochlear
    • Replacement by artificial or mechanical device or prosthesis of
      • cochlea

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC009
Implant, device or graft related encounter
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Cochlear Implants

A cochlear implant is a small, complex electronic device that can help to provide a sense of sound. People who are profoundly deaf or severely hard-of-hearing can get help from them. The implant consists of two parts. One part sits on the outside of the body, behind the ear. A second part is surgically placed under the skin.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Z96.21 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V45.89 Post-proc states NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z96.21Overview

Is Z96.21 (Presence of otological and audiological implants) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cochlear implant status on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z96.21 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because cochlear implant status describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

What is the ICD-9 equivalent of Z96.21?

Under the General Equivalence Mappings, cochlear implant status converts to ICD-9-CM V45.89 (post-proc states NEC). The mapping is approximate, so confirm the match fits the documentation.